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Re: wip-cse

From: Ludovic Courtès
Subject: Re: wip-cse
Date: Wed, 25 Apr 2012 01:14:54 +0200
User-agent: Gnus/5.110018 (No Gnus v0.18) Emacs/24.0.93 (gnu/linux)


Andy Wingo <address@hidden> skribis:

> On Tue 24 Apr 2012 18:31, address@hidden (Ludovic Courtès) writes:
>> Andy Wingo <address@hidden> skribis:
>>> I spent some time poking at vlists and ended up squeezing out a little
>>> bit of performance.
>> Any figures?
> Well, last time I checked, with the patch compiling peval.scm was 2.10
> seconds, compared to 2.35 without.  Not tiny, not huge.

OK.  Would be nice to check with the micro-benchs in as well.

>> Did you try fiddling with ‘block-growth-factor’, as suggested earlier?
> No I did not.  Another thing one could fiddle with would be the block
> size for a new list head.  I feel like we need more metrics though: a
> distribution of sizes of blocks, numbers of blocks in a vlist, hash
> collisions per block, etc.  I'll merge this to master soon and we can
> check what impact the new hash function has on performance.



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